Regional Sewer Infrastructure, Water Quality, and Ongoing Repair Work

Feb 20, 2026

The Potomac Interceptor is a 54-mile sewer system that transports wastewater from Northern Virginia and Maryland to the Blue Plains Advanced Wastewater Treatment Plant in Washington, D.C.  On January 19th, a section of the Potomac Interceptor Sewer Pipeline collapsed near Clara Barton Parkway and the I 495 interchange. The memo provides an overview of the regional sewer infrastructure, key agencies, the timeline of the collapse and response, water quality monitoring and sampling, and regional coordination and communication.

COG By-Laws

Feb 19, 2026

By-Laws of the Metropolitan Washington Council of Governments. Last revision: February 2026.

COG Annual Report

Feb 11, 2026

In 2025, the Council of Governments drove regional progress through bold partnerships. Key achievements included endorsing the DMVMoves transit vision and addressing federal workforce reductions. COG also strengthened public safety coordination and finalized Visualize 2050, the region's federally mandated, metropolitan transportation plan. These initiatives support a resilient, accessible, and sustainable future for all residents and member jurisdictions across metropolitan Washington.

Learn more about this collaborative work and how COG is building on these initiatives in 2025 in COG's annual report and corresponding video.

Visit the Member Benefits web page for a brochure on COG's programs and services.

Member Benefits

Feb 11, 2026

Brochure highlights COG’s wide range of programs and services for its member governments, partner organizations, and the public.

Visit the Annual Report web page to review the past year's accomplishments.

Air and Climate Public Advisory Committee (ACPAC) Bylaws and Rules of Procedure

Feb 1, 2026

Bylaws and Rules of Procedure for the Air and Climate Public Advisory Committee (ACPAC), which serves as an advisor to and at the pleasure of the Metropolitan Washington Air Quality Committee (MWAQC). It also serves as an advisor to the Climate, Energy, and Environment Policy Committee (CEEPC).

Environmental Justice Toolkit

Jan 27, 2026

This Environmental Justice Toolkit 2.0 is an update to COG’s 2017 Environmental Justice (EJ) Toolkit which was designed to provide recommendations for local governments to engage vulnerable and disfavored communities more effectively and appropriately on issues related to climate, energy, and air quality. Its purpose is to highlight best practices, gathered from community leaders and local governments, for enhancing and maintaining engagement with environmental justice communities, and to include examples and resources for additional information.

State of the Commute Survey Report

Jan 21, 2026

Commuter Connections State of the Commute (SOC) Report is produced every three years tracking a wide range of transportation information and assistance services designed to inform Washington DC area commuters of the availability and benefits of alternatives to driving alone and to assist them to find alternatives that fit their commute needs. 

NEW: In addition to the report and executive summary, explore the 2025 SOC Data Dashboard.

Letter Supporting Continuum of Care Funding

Jan 15, 2026

January 15, 2026, letter from the COG Board urging the Congressional delegation and the U.S. Department of Housing and Urban Development (HUD) to take immediate, time-limited action to ensure continuity of Continuum of Care funding during the Fiscal Year 2025 transition and prevent avoidable disruptions to housing and services. 

COG Legislative Priorities

Jan 14, 2026

The legislative priorities approved by the COG Board of Directors focus on supporting the region’s transportation funding, housing, water quality, climate and energy innovation, air quality, human services, emergency preparedness, and infrastructure investment.

 

Growth Trends: Cooperative Forecasting in Metropolitan Washington

Dec 23, 2025

The Growth Trends report provides a summary of the COG's Cooperative Forecasting Program and highlights of the Round 10.0 Cooperative Forecasts.